Friction-clutch.



` drical piece hereinafter designated the quills center ot' pulley andis itted with a disk F.

. the shaft.

-anisni omitted. Fig., 2 is a section on the the short one (l.

coincident elongated slots G. in which are WALTER COMMON, OF GERMISTON,TRANSVAAL.

FRICTION-CLUTCH.

Application tiled June 5, 1907.

Specification of Letters Patent.

Patented IApril 21, 1908.

Serial Ho. 377,327.

To all lzii/toni it 4may concer-lt: l Be it known that l, '.iixrnnConnex, a i subject ol the liing of Great Britain, and a resident ol'Germiston, in the district oi' Witwatersrand, 'l`ransvaal, have inventeda new and Improved Frictionfvlutch, of which the following is aspecilication.

The objee ts ol my improvements are 1st. 'l`o carry the clutch by meansof the gripping pieces alone, tho internal bore ol` the clutch having nocontact with the sha'lt exj cept by means oi said gripping pieces. As Fa consequence when the gripping pieces are released the weight of the.clutch and pull of j the belt being taken up by suitably disposed isupports there will be no friction therefore l no lubrication orattention required when the clutch is at rest.

2nd. l`o make the clutch practically nonslipping as in the event ol'slip a screw arrangement automatically comes into operation whichtightens the grip oi' the friction pieces on thc dislt, which tighteningwill continue till the clutch runs at the saine speed as l attain theseobjects by the mechanism illustrated .in the accompanying drawing inwhich- Figure, l is an elevation of the pulley whic i forms theinclosing shell of the clutch with parts of the clutch operatingmechline 1. 2. Fig., l also a section of the quills and automatictightening arrangement when in gear. `Also an elevation ol' the. diskand shaft with parts omitted for salie of clearness. Fig., 3 is asection ol the automaticl tightening arrangement when out of gear. Fig.,4 is e. section on line 3 4 Fig., 1 also an elevation ol quills,bearings, and o ereting levers. Big., 5 is an elevation ol t e linksconnectingnuts.

. In carrying out the invention the pulley A. has fixed to it at eachside a hollow cylinthe operating levers with the one somewhat longerthan the other, the long one being marked on the drawing B and The shaftE. passes throughttlie quills and f completely surround the disk.

` formed four recesses L. yl tour screws l\l. held in position by clainl the .pieces J and crowding the latter link being the. periphery ofwhich is grooved.` In the erins 'of the pulley at either side arefoi-ined positioned pins H. adapted to move inwards and outwards in seidslots, being retained therein by nuts l. screwed on their outerextremities four such pins are employed.

The gripping pieces J. are formed of wood or any other suitablesubstance, in four circular segments. These pieces are vbolted to curvedbands K, approximately a quarter ol' a circle in length so that the foursegments The ends of the curved bands are constructed with holes throughwhich project the pins H, fixed between the arms oi the pulley, one holein each band being elongated to allow oi contraction or expansion olfbands when the clutch is thrown into or out ot operation.

In the. internal periphery of the pulley7 are in which are placed insplates N (see dotted lines in Fig. l) holesbeing drilled in the heads ofthese screws for adj ustnicnt by means ol' a toggle bar. Onto each ofthese screws is screwed a nut O. which nut is also constructed with anoppo site thread ou the inside with which a correspondingly threadedpiece l engages. This latter piece or screw is constructed in the forniOtan eye and engages the pin H. hetween adjacent ends of the bands l. ltwill be noted that as the nuts O are turned (as by mechanism hereinafterdescribed) the threaded pieces P will be forced radially iiiward carrring with them the pins H, which action wil press the curved bands linward carrying with vthein the shoes or gri ping 'irnily against thedisk or drum F. The nuts O. are constructed with lugs R. On each lu isiv oted one end of a link S. the other en of said twisted a quarter turnto engage the bifurcated link T. connected to the operating levers'U.which levers moving inwards or outwards actuate the ,nuts 0. and causethe gripping pieces to contact with or be released froin the disk?,- Theconnection hef tween these parts is made adjustable by constructing theends of the Vlevers U. with a screw thread and threading thereon a ringV.

formed with projections which engage the bi,

furcated links T.

The levels U. are )ivoted onbrackets WY. fixed to the arms of the pulleyand are simultanouslv actuated by meansfa piece X.

j mounted on the quill B. which piece lcan, be. I

- these paws being mede ef e shepe eene 'means o the damp g.

'ii :el slots eut in, the quil E. one

spending te the tneed eut en e piece c, fastened te the shet.

mounted en the ieee X. which een be moved longtudnely tnefeen by meansof the bfeeated leverff.

Tahen the clutch is t rovm inte epemton by means of the eve'r Y. end mnset el* :about 'the seme speed ee the shaft the piece e. e. is meved Mengby the eve` f. eeusmg the peevs a. e. te engage the sc-ew three. on theshaft the d. d. pessng'ever md-'Qostien efe 'eeked The ever Y. may tuenbe released the etmn' of keeping the gripping pieces tight on .the diskbeing taken by the pews. in the event of the puey slipping el: goingsowe than the shaft the seew Wouu treve' the pewe aong and with them thepiece X. carrying the estu ating iev ere theeey tightening the rippingnieces on the disk,

'When the euteh is :hown out of speseten the pewls are Withdrawn tem thethead and the "levee j'. fastened t@ the lever Y. by The piece X ie thenmoved beek by meenso" the lever Y.. the gripping pieces beqg reeasefl.The emteh feste in the eu perte D. 1t will thus ee seep that thedutcehoee may be caused te ges'p tee drum and Without thowleg the gp eguletng device including the pawls e-e inte operation, this by theemutsmeous movement .of the levers, eed 'futhex thet the pewe -a may bethrown inte o ,eration ey a movement et the 1ew'ej'- in ependently efthe eve Y. These euppelts ere bereit I. gef han the eritema?. diametere' the q mls so that being bought eentrw with the shaft mee-ee o' thegrppsg 'peeee'the q'eis wid me reey 11 and dem* of supporte.

Whet eem es my invention and desire te eeeue by Letters Patent is# l. Aderiving membe and e driven mem neig one of seid mrts including e' drum'seemed thereto anu the other having shoes ceried thez'eDy-to gp seiddrum, ueeded member nome by each shoe and e threedef memne located Offthe shoe, .seid threaded members having e connecting tlneaded. membermovabe te cause the shoee te gip the dum, means for edjustng seid theedemembers one with Teepeet te aneth l means for peretng said. eenneet'mgthreade membe. l

2. driving member and driven member, ene of seid parte ueludug e drumseemed thereto and the ,oxe -nehldiue e puxey having mme that ineueeepere members in e single erm, shoes extenmng .hem one te another ofseid arms and linked.

when the euteh is operation These pewle ae een-k neeted by means et lmked. d. te e piece e. e..

a @diving ene ei ee `i pets 'herein-elm. the e uHey 'fw-ith arms the sin e snge en',

zu ene to enethe ey. mui

h ne-ving its ends 'omzeix be 7;-,

s and @aided he .einem te they e' arms and eee tween the memberseftheebyll :md means fe? i .grip seid dflim.

4. f3. driving menxer end Y. bei, one o: seid. parts neudng ab. drumseemed theetu md the et este including e puey with include seperatedmembes in e. having guide slots, ue e'' e'mee e'ioump the (imm, the eei" meeting mld Abeing ieined bem ,en the hexe of seid mme, meinesextending shoes inte the siete to gjutxe the their mde movement, and methe shoes te eind the drum'.

le. thriving; meufne'f end e. drive sed parte nemlng et@ und the etheiim seem-ext the pulley hevng arme thet nehue memb s in e single erm,ewee t ecilmelentiay om one te enetser amsand Wlte the' ends Lave' 'themembes o' the mms, vieeee wenn betf-Jeeu the ende e Seid eheee un i seme"between the members et el t threaded pmt eonneeted with the mee ine;endeof Sad shoes between the me eeeh mm, connecting threede emite.Heeten oft" the shoes between the mex'tfbes e of the 1s, connectingtheeded D.

enmutenent to the meetmv ende e? 'the eem e'foes, and mee-13e 01"opere-tang; the nee theeded parte.

6. e vng membef end e iv bef, one of ee pets indu( l le; e eh# @umseeure thereto end the @the parte including e puey with sheee leted;between eet-M1 eme, member bom-e by eeeh shee u. eee ing theeed membereees by the n Conner/tine; threaded membre? 'te 'the eheee te dimm, emiwel epemtng seid eenneetng A A dveg; membe eel e l, une of eei ee-ftemeinem@ S eued .'eaete euri the ethe seid Enketege-times eier3 te seiddrum, emi sfee et their leemte el' them the .3 f enea e tu,

...LU C3 estese neeticn each with another, and means operating upon theshoes at their points of pvotal comiection for crowding them againstsaid drum.

9. A driving member and a driven niembei', one of said parts includingadruni secured thereto and the other part carrying shoes each having aslotted pivotal coniiec- 11. A driving member and a driven inc'mj bei',one of said )arts including a drum sen cured thereto an the otherincluding a pulley having separated arms, shoes located between saidarms and linked. together to grip said drum, and means located back olthe shoes and lia-ving an abutment against the pulley for crowding theyshoes against the drum.

l2. A driving member and a driven men ber, one ol said oarts including adrum secured thereto and the other including apul- `ley with separatedarms, slices located between said arms and each pivotally connected toanother, means located back of the slices for crowding them against thedrum, and means for simultaneously operating said actuating means.

13. A driving member and a driven inember, one of said parts including`a drum secured thereto and the other including a pulley with separatedarms, said arms having guide slots, shoes located and with their endspivotally connected to each other between said arms, a guide extendingfrom the shoes into the slots in said arms, andmeaiis located betweenthe arms and back ot' the shoes for forcing the latter against thedrinn.

14. A driving member and a driven nieniber, one of said parts having acani-eoii- `nested therewith, clutch'v parts located between saidmembers, a member for causing engagement of' said clutch parts, and amene ber to hold said clutch )arts in engagement and connected with saicam to control the gripping action of the clutch.

15. A driving member and a driven mein ber, one of said parts having acam connected therewith, clutch parts between said members, a member forcausing initial erigagement of the clutch parts, a holding membermovable to position to retain the clutch parts in engagement, saidmovement also operating a connection with said cam to control the degreeof gripping action of the clutch, and connection between said holdingmeans and cam.

a cani, clutch parts located between. said nienibers, a clutch operatingmember and a i clutch holding' member, the former scpal intely movableto4 cause engagement ol the i clutch parts and the latter adapted tocony neet with said cam and separately movable i to co-act with theclutch operating member, 'said clutch operating member-and clutch rholding member having connecting means to l cause simultaneous operationof said parts lto prevent operation of the clutch holding member.

17. A driving member and a driven meniber. one of said parts connectedwith a cam, clutch parts located between said members, l a clutchengaging member and a-ciutcli holding member, connections between thelatter and said cani to vary the gripping action ol' the clutch, said.clutch engaging member and clutch holding member being siuiultaneouslymovable to cause operation ol the clutch and the clutch holding memberbeing separately operable to operate the connection with said cam.

18. A driving member and a driven member7 clutch parts located. betweensaid mene bers, a slidable member to cause initial engagement of theclutch parts, a slidablc member to retain said pai-ts in engagement, anda device operatively connected with both of said iiieinbcis and arrangedto opci`- between said parts.

il). A driving member and a driven memc bei', a clutch located betweensaid members, a system of levers for operating the clutch, a memberinitially movable to operate said levers, and a second memberoperatively connected with the tirst and arranged to retain `said clutchparts in engagement.

20. A driving member and a driven meine ber, a clutch for connectingsaid arts, a member to initially engage. the cliitcn parts, a secondmember to hold said clutch parts in engagement, means for operating saidmembers, and connections between said operating,T means to secure saidparts against rela,- i tive n'iovement.

2l. A driving member and a driven meniber, one of said part-s includinga drum secured thereto and the other a pulley with two part arms, quillsprojecting from 0ppm site sides of the pulley, bearings to support saidquills and pulley independcntlyof the shaft, a clutch member borne bythe pulley. and means for operating the clutch to bind said drum.

22. A driving and a driven member, one of said parts including a pulleywith a quill pro 'ecting therefrom and the other of said parts having adrum secured thereto, a clutch borne by the pulley to grip said drum,means for' operating the clutch, said moans including a ate upon theclutch upon relative rotation

